· Pain under the right breast often results from muscle strain or a minor injury, and it will usually get better on its own. However, pain in this Author: Rachel Nall, MSN, CRNA. · "i been having trouble really sharp pain under my right breast feels really really sharp like a knife pain come when i'm sitting down trying to get up?" Answered by a verified doctor: See your Doctor.: 90% of chest pains are musculoskeletal in origin. Me.
· Pain under your right breast may indicate a health condition, like pleurisy or a hernia, or it could just be a simple rib injury. We’ll explain the reasons this pain Author: Scott Frothingham. · Diagnosing the Pain. If you have recently been exercising and your symptoms are stable (not worsening), the sharp pain under right breast may just be a temporary condition related to strain (costochondritis). This is one of the most common causes of pain in the chest and it may resolve with rest and pain relievers.